\begin{tabular}{l*{11}{c}}
\hline
                 &\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}&\multicolumn{1}{c}{Yr}\\         &\multicolumn{1}{c}{4}&\multicolumn{1}{c}{5}&\multicolumn{1}{c}{6}&\multicolumn{1}{c}{7}&\multicolumn{1}{c}{8}&\multicolumn{1}{c}{9}&\multicolumn{1}{c}{10}&\multicolumn{1}{c}{11}&\multicolumn{1}{c}{12}&\multicolumn{1}{c}{13}&\multicolumn{1}{c}{14}\\ \hline  \emph{Second stage}\\
Enrollment  &       0.096***&       0.081*  &       0.057   &       0.036   &       0.030   &       0.048   &       0.072   &       0.079   &       0.049   &       0.054   &       0.034   \\
            &     (0.034)   &     (0.044)   &     (0.050)   &     (0.057)   &     (0.055)   &     (0.055)   &     (0.054)   &     (0.054)   &     (0.054)   &     (0.057)   &     (0.054)   \\
\hline
Controls    &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   &         Yes   \\
F-stat      &         212   &         219   &         221   &         221   &         221   &         221   &         221   &         221   &         222   &         222   &         222   \\
N           &        3608   &        3618   &        3624   &        3625   &        3627   &        3627   &        3627   &        3627   &        3628   &        3629   &        3629   \\
Mean of Y   &        0.16   &        0.24   &        0.30   &        0.34   &        0.38   &        0.41   &        0.44   &        0.46   &        0.48   &        0.49   &        0.51   \\
\hline
\end{tabular}
